重新部署后的无效

Question

我正在为MySql数据库开发一个应用程序tha使用七个数据源(ds)。当它开始工作的时候，我对结果相当满意。然而，当我重新部署我的应用程序时，我会得到与数据源相关的问题。

下面是我在我的应用程序-ds.xml中配置的七个ds中的一个：

<xa-datasource>
            <jndi-name>jdbc/my_db_name</jndi-name>
            <xa-datasource-class>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</xa-datasource-class>
            <xa-datasource-property name="URL">jdbc:mysql://192.168.26.2:3306/my_db_name</xa-datasource-property>
            <xa-datasource-property name="User">user</xa-datasource-property>
            <xa-datasource-property name="Password">password</xa-datasource-property>
            <min-pool-size>0</min-pool-size>
            <max-pool-size>5</max-pool-size>
            <idle-timeout-minutes>5</idle-timeout-minutes>
            <exception-sorter-class-name>
            com.mysql.jdbc.integration.jboss.ExtendedMysqlExceptionSorter
            </exception-sorter-class-name>
            <valid-connection-checker-class-name>
            com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker
            </valid-connection-checker-class-name>
            <track-connection-by-tx/>
</xa-datasource>

我想我已经按照我在网上找到的关于这件事的所有信息进行了正确的配置。

1。部署应用程序运行测试OK

2 .重新部署应用程序，运行测试NOK

10:07:23,865在尝试获得新连接时警告JBossManagedConnectionPool Throwable : null

org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.lang.NullPointerException)
at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.createManagedConnection(XAManagedConnectionFactory.java:144)
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:577)
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:262)
at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:500)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.getManagedConnection(BaseConnectionManager2.java:341)
at org.jboss.resource.connectionmanager.TxConnectionManager.getManagedConnection(TxConnectionManager.java:315)
at org.jboss.resource.connectionmanager.BaseConnectionManager2.allocateConnection(BaseConnectionManager2.java:396)
at org.jboss.resource.connectionmanager.BaseConnectionManager2$ConnectionManagerProxy.allocateConnection(BaseConnectionManager2.java:842)
at org.jboss.resource.adapter.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:88)
at org.hibernate.connection.DatasourceConnectionProvider.getConnection(DatasourceConnectionProvider.java:69)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:84)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2073)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1298)
at net.saphety.billing_core.dblayer.datasource.HibernateSession.configure(HibernateSession.java:58)
at net.saphety.billing_core.dblayer.datasource.HibernateSessionFactory.getHibernateSession(HibernateSessionFactory.java:25)
at net.saphety.billing_core.dblayer.datasource.HibDaoCRUD.<init>(HibDaoCRUD.java:35)
at net.saphety.billingcorewebapp.web.FilterHibernateControlSession.doFilter(FilterHibernateControlSession.java:43)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:426)
at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:137)
at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:107)
at com.mysql.jdbc.jdbc2.optional.MysqlXADataSource.getXAConnection(MysqlXADataSource.java:47)
at org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory.createManagedConnection(XAManagedConnectionFactory.java:136)
... 34 more

之后hibernate抱怨方言..。

org.hibernate.HibernateException: Hibernate Dialect must be explicitly set
at net.saphety.billing_core.dblayer.datasource.HibernateSession.configure(HibernateSession.java:62)
at net.saphety.billing_core.dblayer.datasource.HibernateSessionFactory.getHibernateSession(HibernateSessionFactory.java:25)
at net.saphety.billing_core.dblayer.datasource.HibDaoCRUD.<init>(HibDaoCRUD.java:35)
at net.saphety.billingcorewebapp.web.FilterHibernateControlSession.doFilter(FilterHibernateControlSession.java:43)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:619)

3 .重新部署*-ds.xml文件并运行测试NOK，什么都不会发生.在我的浏览器中，我收到一个空白的响应.

4 .重新部署应用程序，一切都正常。:S

MySql服务器有足够的可用连接。

我有其他的项目与数据源，但与甲骨文服务器，没有问题。所以这和MySql有关，但我不知道是什么。

Answer 1

这些问题看起来像MySql问题，所以您应该检查那里的日志。

Caused by: java.lang.NullPointerException
    at com.mysql.jdbc.jdbc2.optional.MysqlDataSource.getConnection(MysqlDataSource.java:426)

指示与MySql连接的深度失败。给定到MySql实例的连接数量。可能连接是无效的，但是JBoss正在尝试重用它。

尝试更改数据库连接以使用：

  <min-pool-size>1</min-pool-size>

甚至是零，不只是在启动时抓取池连接。还可以查看是否可以配置MySql以允许更多的同时连接。现在，只有您的JBoss部署将在启动时使用35个连接，最多可达到140个。您真的需要这么多连接吗? MySql实例是否配置为处理这么多连接。如果不是，让这些参数更加一致，您的问题应该会变得更好。

Answer 2

一个侧面的回答。我们有时会发现我们需要关闭服务器；删除测试、数据和工作(如果不需要旧目录的话也可以日志记录)，从您的部署中删除目录；并将服务器恢复。最常见的情况是，当我们运行不稳定代码时，会出现部分事务、已完成和其他混乱的崩溃。当JBoss再次启动时，将重新生成这些文件夹。有关这些文件夹的概述，请参见本网页。